A moisture absorption device for an oil conservator of a transformer

Abstract

The present application relates to the technical field of transformer, and provides an oil pillow moisture absorption device for a transformer, which comprises a shell, a top cover and a bottom plate, the shell comprises a first cylinder, a second cylinder and a third cylinder which are concentrically arranged from outside to inside, the first cylinder and the third cylinder jointly form an air inlet space, the second cylinder separates the air inlet space into a first air passing cavity and a second air passing cavity, the first cylinder is provided with a first air passing opening at the top thereof, the second cylinder is provided with a second air passing opening at the bottom thereof, the third cylinder jointly forms a containing space for containing a drying cylinder, the third cylinder is provided with a third air passing opening at the top thereof, the drying cylinder is provided with an air hole at the upper end thereof, the drying space is communicated with the outside through a connecting pipe, and the air inlet space is used for containing transformer oil, so that the transformer oil can be prevented from polluting the drying agent.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transformers, and particularly relates to an oil conservator moisture absorption device for a transformer. BACKGROUND

[0002] An oil-immersed transformer is usually provided with an oil conservator, which can adjust the oil volume when the volume of transformer oil in the transformer expands or decreases with the temperature of the transformer oil, so as to ensure that the transformer oil tank is always full of oil. When the transformer oil in the transformer expands due to heating, the oil conservator will exhale the excess air inside. When the transformer oil in the transformer shrinks due to temperature reduction, the oil conservator will inhale air from the outside space. In order to avoid the transformer oil inside the transformer and the oil conservator from being damp, and to ensure the insulation strength of the transformer oil, a moisture absorption device needs to be provided to filter and absorb moisture from the outside air.

[0003] The commonly used moisture absorption device is a transformer breather. When the oil conservator inhales the outside air, the outside air first passes through the transformer oil stored in the oil cup at the bottom of the moisture absorption device, so as to filter the dust in the outside air. Then, the outside air passes through the glass tube of the moisture absorption device, and the desiccant in the glass tube absorbs the moisture in the outside air, so that the transformer oil in the oil conservator is not invaded by the moisture and dust in the outside air. However, this moisture absorption device has some deficiencies in use: when the oil conservator inhales a large amount of air, the air passage in the oil cup at the bottom of the moisture absorption device becomes larger, a large amount of air bubbles are formed in the transformer oil stored in the oil cup at the bottom of the moisture absorption device, the transformer oil in the oil cup at the bottom of the moisture absorption device splashes upward, and the desiccant is contaminated in a large area, so that the moisture absorption effect of the desiccant is reduced. Therefore, it is necessary to propose an oil conservator moisture absorption device for a transformer, which can avoid contamination of the transformer oil to the desiccant. SUMMARY

[0004] The main purpose of the present application is to provide an oil conservator moisture absorption device for a transformer, which can avoid contamination of the transformer oil to the desiccant.

[0005] In order to achieve the above object, the oil conservator moisture absorption device for a transformer provided by the present application comprises a moisture absorption device main body, the moisture absorption device main body comprises a shell, a top cover and a bottom plate, the shell comprises a first cylinder, a second cylinder and a third cylinder which are concentrically arranged from outside to inside, the top cover is used for closing the top end opening of the shell, the bottom plate is used for closing the bottom end opening of the shell, the inner wall surface of the first cylinder and the outer wall surface of the third cylinder jointly form an air inlet space, the second cylinder separates the air inlet space into a first air passing cavity and a second air passing cavity, the top of the first cylinder is provided with a first air passing opening for communicating the first air passing cavity with an external space, the bottom of the second cylinder is provided with a second air passing opening for communicating the first air passing cavity with the second air passing cavity, the inner wall surface of the third cylinder jointly forms a containing space for containing a drying cylinder, the top of the third cylinder is provided with a plurality of third air passing openings for communicating the second air passing cavity with the containing space, the drying cylinder jointly forms a drying space for containing a drying agent, the upper end of the drying cylinder is formed with a plurality of air holes for communicating the drying space with the containing space, the bottom end of the drying space is communicated with the internal space of the oil conservator through a connecting pipe, and the bottom of the air inlet space contains transformer oil which immerses the second air passing opening.

[0006] Preferably, the drying cylinder is a cylindrical structure, the top cover and the bottom plate are both circular structure members, the top cover is detachably connected with the shell, and the top surface of the bottom plate is fixedly connected with the bottom surface of the first cylinder, the bottom surface of the second cylinder and the bottom surface of the third cylinder respectively.

[0007] Preferably, the oil conservator moisture absorption device for a transformer further comprises a water collector, the water collector jointly forms a water collecting space, the bottom plate is provided with a drain port which penetrates through the thickness direction of the cover body, the upper part of the water collector is provided with a communication structure, the communication structure is used for communicating with the drain port, so that the water collecting space can receive the moisture discharged from the drain port.

[0008] Preferably, the bottom surface of the drying cylinder is provided with a connecting port, one end of the connecting pipe is communicated with the inside of the drying cylinder through the connecting port, the other end of the connecting pipe is used for being communicated with the inside of the oil conservator through a pipeline, the middle part of the bottom plate is formed with a through hole for the connecting pipe to pass through, and the water collector is an annular structure member which surrounds the through hole.

[0009] Preferably, the top surface of the bottom plate is protruded away from the bottom plate to form a lower fixing ring for clamping the bottom end of the drying cylinder, the bottom surface of the top cover is protruded away from the top cover to form an upper fixing ring for clamping the top end of the drying cylinder, the upper fixing ring and the lower fixing ring are concentrically arranged with the third cylinder respectively, and the drain port is arranged between the third cylinder and the lower fixing ring.

[0010] Preferably, an electric heating element is arranged in the drying cylinder, the electric heating element is arranged in a spiral shape and concentrically with the drying cylinder, the electric heating element is connected with an external power source through an electric wire, and the top cover is formed with a wire hole through which the electric wire passes, the wire hole being located between the upper fixed ring and the third cylinder body.

[0011] Preferably, a transparent observation window is arranged in the middle of the top cover, and the drying cylinder is a transparent structure, the transparent observation window being arranged concentrically with the drying cylinder to facilitate the observation of the inside of the drying cylinder by an operator.

[0012] Preferably, the moisture absorption device for the oil pillow of the transformer further comprises a cooling element arranged between the third cylinder body and the outer wall surface of the drying cylinder, the cooling element comprising a plurality of cooling plates arranged along the length direction of the third cylinder body.

[0013] Preferably, the cooling element further comprises a cooling ring arranged concentrically with the third cylinder body, a cooling space being formed between the third cylinder body and the outer wall surface of the drying cylinder, the cooling ring being arranged in the cooling space, and the top end of each cooling plate being connected with the cooling ring.

[0014] Preferably, the moisture absorption device for the oil pillow of the transformer further comprises a waterproof cover used for covering the main body of the moisture absorption device, one end of the waterproof cover being connected with the top surface of the top cover, and the other end of the waterproof cover being formed with a guide surface used for guiding rainwater to slide off the edge of the waterproof cover.

[0015] In the technical scheme of the present application, the working principle of the moisture absorption device for the oil pillow of the transformer is as follows:

[0016] When the transformer oil in the oil pillow is cooled and the oil pillow inhales air inwardly, the gas in the external space enters the first air passing cavity from the first air passing hole at the top of the first cylinder body, flows downward along the first air passing cavity, passes through the transformer oil contained at the bottom of the air inlet space, enters the second air passing cavity from the second air passing hole at the bottom of the second cylinder body, then flows upward along the second air passing cavity, enters the containing space through the third air passing hole at the top of the third cylinder body, and then enters the inside of the drying cylinder from the air vent, the drying agent in the inside of the drying cylinder absorbs the moisture in the gas, and finally the dried gas enters the oil pillow through the connecting pipe.

[0017] When the transformer oil in the oil conservator is heated and the oil conservator discharges gas, the discharged gas enters the bottom end of the drying cylinder through the connecting pipe, then flows along the length direction of the drying cylinder to the upper end of the drying cylinder, enters the containing space from the air vent hole at the upper end of the drying cylinder, then enters the second air passing cavity through the third air passing opening, then flows through the second air passing cavity, enters the first air passing cavity from the second air passing opening, and then flows through the first air passing cavity and is discharged from the first air passing opening.

[0018] In summary, by arranging the first cylinder body, the second cylinder body and the third cylinder body, the inner wall surface of the first cylinder body and the outer wall surface of the third cylinder body enclose the air inlet space, the bottom of the air inlet space contains the transformer oil, and the drying cylinder is contained in the containing space enclosed by the inner wall surface of the third cylinder body, so that the transformer oil and the drying cylinder are separated by the third cylinder body, thereby avoiding the contamination of the drying agent by the splashing of the transformer oil when the oil conservator inhales external air. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort based on the drawings shown.

[0020] Figure 1 FIG. 1 is a structural schematic diagram of an embodiment of the oil conservator moisture absorption device for a transformer;

[0021] Figure 2 FIG. 1 is a structural schematic diagram of an embodiment of the oil conservator moisture absorption device for a transformer;

[0022] Figure 3 FIG. 1 is a structural schematic diagram of an embodiment of the oil conservator moisture absorption device for a transformer;

[0023] DETAILED DESCRIPTION

[0024] 1 - moisture absorption device body; 11 - shell; 111 - first cylinder body; 111a - first air passing opening; 112 - second cylinder body; 112a - second air passing opening; 113 - third cylinder body; 113a - third air passing opening; 12 - top cover; 2 - drying cylinder; 21 - air vent hole; 3 - cooling element; 31 - cooling ring; 32 - cooling plate; 4 - water collector; 41 - communication structure; 5 - connecting pipe.

[0025] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referenced. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two or three, unless otherwise specifically defined.

[0029] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides an oil pillow moisture absorption device for a transformer.

[0032] Please refer to Figures 1 to 3The oil conservator moisture absorption device for a transformer includes a moisture absorption device body 1, the moisture absorption device body 1 includes a shell 11, a top cover 12 and a bottom plate, the shell 11 includes a first cylinder 111, a second cylinder 112 and a third cylinder 113 arranged concentrically from the outside to the inside, the top cover 12 is used to close the top end opening of the shell 11, and the bottom plate is used to close the bottom end opening of the shell 11. The inner wall surface of the first cylinder 111 and the outer wall surface of the third cylinder 113 are combined to form an air intake space, the second cylinder 112 divides the air intake space into a first air cavity and a second air cavity, and a first air cavity for connecting the first air cavity with the external space is provided on the top of the first cylinder 111. The bottom of the second cylinder 112 is provided with a second air port 112a for connecting the first air cavity and the second air cavity. The inner wall surface of the third cylinder 113 is enclosed to form a storage space for accommodating the drying cylinder 2. The top of the third cylinder is provided with multiple third air ports 113a for connecting the second air cavity and the storage space. The drying cylinder 2 is enclosed to form a drying space for accommodating the desiccant. The upper end of the drying cylinder 2 is formed with multiple vents 21 connecting the drying space and the storage space. The bottom end of the drying space is connected to the internal space of the oil pillow through the connecting pipe 5. The bottom of the air intake space contains transformer oil that immerses the second air port 112a. The transformer oil is contained at the bottom of the air intake space, immersing the second air port 112a, to prevent air from the external space from entering the second air cavity when the oil pillow is not inhaling air. At the same time, the transformer oil can absorb dust in the external air.

[0033] In the technical solution of the present invention, the working principle of the oil conservator moisture absorption device for transformer is as follows:

[0034] When the transformer oil in the oil pillow cools down and the oil pillow draws air inward, the gas in the external space enters the first air cavity from the first air port 111a at the top of the first cylinder 111, flows downward along the first air cavity, passes through the transformer oil contained in the bottom of the air intake space, enters the second air cavity from the second air hole at the bottom of the second cylinder 112, then flows upward along the second air cavity, enters the containing space through the third air port 113a at the top of the third cylinder 113, and then enters the interior of the drying cylinder 2 from the air vent 21. The desiccant inside the drying cylinder 2 absorbs moisture in the gas, and finally the dried gas enters the oil pillow through the connecting pipe 5.

[0035] When the transformer oil in the oil conservator heats up and the oil conservator vents gas, the exhausted gas enters the bottom end of the drying cylinder 2 through the connecting pipe 5, then flows along the length of the drying cylinder 2 toward the upper end of the drying cylinder 2, enters the accommodating space through the vent hole 21 at the upper end of the drying cylinder 2, then enters the second air passage cavity through the third air passage port 113a, then flows through the second air passage cavity, enters the first air passage cavity through the second air passage port 112a, then flows through the first air passage cavity, and is discharged from the first air passage port 111a.

[0036] To sum up, by arranging the first cylinder 111, the second cylinder 112 and the third cylinder 113, the inner wall surface of the first cylinder 111 and the outer wall surface of the third cylinder 113 are enclosed to form an air intake space, the bottom of the air intake space contains transformer oil, and the drying cylinder 2 is contained in the accommodating space formed by the inner wall surface of the third cylinder 113. The transformer oil and the drying cylinder 2 are separated by the third cylinder 113, so as to avoid the transformer oil splashing and contaminating the desiccant when the oil pillow inhales external air.

[0037] Preferably, the drying drum 2 is cylindrical, and the top cover 12 and the bottom plate are both circular structural members. The top cover 12 is detachably connected to the housing 11, and the top surface of the bottom plate is fixedly connected to the bottom surfaces of the first cylindrical body 111, the second cylindrical body 112, and the third cylindrical body 113. In this embodiment, a sealing ring is further provided at the connection between the top cover 12 and the first cylindrical body 111 to prevent water-containing air in the external space from entering the interior of the oil conservator moisture absorption device for a transformer through the gap between the top cover 12 and the first cylindrical body 111.

[0038] Preferably, the oil pillow moisture absorption device for the transformer further includes a water collector 4, the water collector 4 encloses and forms a water collection space, the bottom plate is provided with a drain port penetrating along the thickness direction of the cover body, and a connecting structure 41 is provided on the upper part of the water collector 4, the connecting structure 41 is used to communicate with the drain port so that the water collection space can receive the water discharged from the drain port. When the hot air in the transformer enters the drying cylinder 2, it heats the desiccant in the drying cylinder 2, causing the water adsorbed by the desiccant to evaporate, and then cools and condenses into water droplets on the inner wall surface of the third cylinder 113 and the outer wall surface of the drying cylinder 2. The water droplets gather and flow down to the bottom of the accommodating space, and then gather into the water collection space through the drain port, thereby improving the service life of the desiccant in the drying cylinder 2; in this embodiment, the connecting structure 41 extends vertically upward to form a tubular structural member, the connecting structure 41 is used to be inserted into the drain port, and the outer wall surface of the connecting structure 41 is tightly connected to the inner wall surface of the drain port.

[0039] Preferably, the bottom surface of the drying drum 2 is provided with a connection port, through which one end of the connecting pipe 5 communicates with the interior of the drying drum 2, and the other end of the connecting pipe 5 is used to communicate with the interior of the oil pillow via a pipeline. A through hole is formed in the middle of the bottom plate for the connecting pipe 5 to pass through. The water collector 4 is an annular structure, and is arranged around the through hole. In this embodiment, multiple drain outlets are provided, and the connecting structures 41 are arranged one-to-one with the drain outlets, and each drain outlet is evenly arranged around the center of the bottom plate.

[0040] Preferably, the top surface of the bottom plate is formed with a lower fixing ring protruding away from the bottom plate for clamping the bottom end of the drying cylinder 2, and the bottom surface of the top cover 12 is formed with an upper fixing ring protruding away from the top cover 12 for clamping the top end of the drying cylinder 2. The upper fixing ring and the lower fixing ring are respectively arranged concentrically with the third cylinder 113, and the drain outlet is arranged between the third cylinder 113 and the lower fixing ring. The upper fixing ring and the lower fixing ring are provided to cooperate with the clamping to fix the drying cylinder 2; in this embodiment, the bottom surface of the drying cylinder 2 is used to fit on the top surface of the bottom plate, and the bottom surface of the top cover 12 is used to fit on the top surface of the drying cylinder 2.

[0041] Preferably, an electric heating element is provided in the drying cylinder 2. The electric heating element is arranged spirally and concentrically with the drying cylinder 2. The electric heating element is connected to an external power source via an electric wire. The top cover 12 is formed with a wire hole for the wire to pass through. The wire hole is located between the upper fixing ring and the third cylinder 113. The electric heating element is provided to heat the desiccant in the drying cylinder 2 and discharge moisture absorbed by the desiccant, so that the desiccant in the drying cylinder 2 can be reused.

[0042] Preferably, a transparent observation window is provided in the middle of the top cover 12, and the drying cylinder 2 is a transparent structural member. The transparent observation window is provided concentrically with the drying cylinder 2 so that the operator can observe the interior of the drying cylinder 2. The transparent observation window is provided to facilitate the operator to observe the interior of the drying cylinder 2, and thus determine whether the desiccant in the drying cylinder 2 needs to be heated according to the color of the desiccant; in this embodiment, the oil pillow moisture absorption device for the transformer further includes a camera and an analysis control module, the analysis control module is connected to the camera and the electric heating element respectively, the camera is provided in the transparent observation window, and is used to observe the desiccant inside the drying cylinder 2, the analysis control module is used to receive the image from the camera, identify the image color, and turn on the electric heating element after the set color in the received image reaches a set range and turn off the electric heating element after a set time.

[0043] Specifically, the upper fixing ring is arranged around the transparent observation window, and the desiccant is color-changing silica gel. The desiccant appears blue when dry and becomes purple-red after absorbing water and becoming moist.

[0044] Preferably, the oil pillow moisture absorption device for the transformer further includes a cooling element 3, which is arranged between the third cylinder 113 and the outer wall of the drying cylinder 2, and includes a plurality of cooling plates 32 arranged along the length direction of the third cylinder 113. The cooling element 3 is arranged to accelerate the condensation speed of water vapor, and the cooling plates 32 can guide the condensed water to slide downward; in this embodiment, the cooling element 3 is a metal structural member, and the top surface of the bottom plate is recessed toward the bottom surface of the top cover 12 to form a plurality of rectangular grooves and an annular groove, and the rectangular grooves are arranged in a one-to-one correspondence with the cooling plates 32, and the bottom ends of the cooling plates 32 are accommodated in the corresponding rectangular grooves, and each rectangular groove is respectively connected to the annular groove, and the top of each drain port is connected to the bottom of the annular groove.

[0045] Preferably, the cooling element 3 further includes a cooling ring 31, which is concentrically arranged with the third cylinder 113. A cooling space is formed between the third cylinder 113 and the outer wall of the drying cylinder 2. The cooling ring 31 is arranged in the cooling space, and the top of each cooling plate 32 is respectively connected to the cooling ring 31. The cooling ring 31 is provided so that an operator can grab the cooling ring 31 to conveniently remove and install the cooling element 3.

[0046] Preferably, the oil conservator moisture absorption device for a transformer further includes a waterproof cover, which is used to cover the moisture absorption device body 1. One end of the waterproof cover is connected to the top surface of the top cover 12, and the other end of the waterproof cover is formed with a guide surface for guiding rainwater to slide off the edge of the waterproof cover. The waterproof cover is provided to cover the moisture absorption device body 1 to prevent rainwater from falling into the air intake space through the first air outlet 111a and contaminating the transformer oil therein. In this embodiment, the waterproof cover is a hollow conical structure, with its apex facing away from the moisture absorption device body 1.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made based on the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A moisture absorption device for an oil conservator of a transformer, characterized in that: The invention comprises a moisture absorption device body, wherein the moisture absorption device body comprises a shell, a top cover and a bottom plate, wherein the shell comprises a first cylinder, a second cylinder and a third cylinder concentrically arranged from the outside to the inside, the top cover is used to close the top end opening of the shell, and the bottom plate is used to close the bottom end opening of the shell, the inner wall surface of the first cylinder and the outer wall surface of the third cylinder are combined to form an air intake space, and the second cylinder divides the air intake space into a first air passage cavity and a second air passage cavity, the top of the first cylinder is provided with a first air port for connecting the first air passage cavity with the external space, and the bottom of the second cylinder is provided with a A second air port is provided for connecting the first air cavity and the second air cavity, the inner wall surface of the third cylinder is enclosed to form a storage space for accommodating the drying cylinder, and a plurality of third air ports for connecting the second air cavity and the storage space are provided on the top of the third cylinder. The drying cylinder is enclosed to form a drying space for accommodating the desiccant, and a plurality of air vents connecting the drying space and the storage space are formed at the upper end of the drying cylinder. The bottom end of the drying space is connected to the internal space of the oil pillow through a connecting pipe, and the bottom of the air inlet space contains transformer oil that immerses the second air port.

2. The oil conservator moisture absorption device for transformer according to claim 1, characterized in that: The drying cylinder is a cylinder, the top cover and the bottom plate are both circular structural parts, the top cover is detachably connected to the shell, and the top surface of the bottom plate is fixedly connected to the bottom surfaces of the first cylinder, the second cylinder and the third cylinder respectively.

3. The oil conservator moisture absorption device for transformer according to claim 1, characterized in that: It also includes a water collector, which encloses a water collection space. The bottom plate is provided with a drain outlet along the thickness direction of the cover body. A connecting structure is provided on the upper part of the water collector, which is used to connect with the drain outlet so that the water collection space can receive the water discharged from the drain outlet.

4. The oil conservator moisture absorption device for transformer according to claim 3, characterized in that: A connecting port is provided on the bottom surface of the drying cylinder, one end of the connecting pipe is connected to the interior of the drying cylinder through the connecting port, and the other end of the connecting pipe is used to communicate with the interior of the oil pillow through a pipeline. A through hole is formed in the middle of the bottom plate for the connecting pipe to pass through, and the water collector is an annular structural member, and the water collector is arranged around the through hole.

5. The oil conservator moisture absorption device for transformer according to claim 3, characterized in that: The top surface of the bottom plate is protruded away from the bottom plate to form a lower fixing ring for clamping the bottom end of the drying cylinder, and the bottom surface of the top cover is protruded away from the top cover to form an upper fixing ring for clamping the top end of the drying cylinder. The upper fixing ring and the lower fixing ring are respectively arranged concentrically with the third cylinder, and the drain outlet is arranged between the third cylinder and the lower fixing ring.

6. The oil conservator moisture absorption device for transformer according to claim 5, characterized in that: An electric heating element is provided in the drying cylinder. The electric heating element is spirally arranged and concentrically arranged with the drying cylinder. The electric heating element is connected to an external power supply through an electric wire. The top cover is formed with a wire hole for the wire to pass through. The wire hole is located between the upper fixing ring and the third cylinder.

7. The oil conservator moisture absorption device for transformer according to claim 5, characterized in that: A transparent observation window is provided in the middle of the top cover. The drying cylinder is a transparent structural member. The transparent observation window is provided concentrically with the drying cylinder to facilitate operators to observe the interior of the drying cylinder.

8. The oil conservator moisture absorption device for transformer according to claim 3, characterized in that: It also includes a cooling element, which is arranged between the third cylinder and the outer wall of the drying cylinder. The cooling element includes a plurality of cooling plates arranged along the length direction of the third cylinder.

9. The oil conservator moisture absorption device for transformer according to claim 8, characterized in that: The cooling element also includes a cooling ring, which is concentrically arranged with the third cylinder. A cooling space is formed between the third cylinder and the outer wall of the drying cylinder. The cooling ring is arranged in the cooling space, and the top of each cooling plate is respectively connected to the cooling ring.

10. The oil conservator moisture absorption device for a transformer according to any one of claims 1 to 9, characterized in that: It also includes a waterproof cover, which is used to cover the moisture absorbing device body. One end of the waterproof cover is connected to the top surface of the top cover, and the other end of the waterproof cover is formed with a guide surface for guiding rainwater to slide down from the edge of the waterproof cover.

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